CN211348844U

CN211348844U - Long-wave infrared panoramic periscope device

Info

Publication number: CN211348844U
Application number: CN201922137425.8U
Authority: CN
Inventors: 姚远; 郭劼; 董亭亭; 李长庚; 郭凡
Original assignee: 717th Research Institute of CSIC
Current assignee: Wuhan Huazhong Kuangteng Optical Technology Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-08-25
Anticipated expiration: 2029-12-03

Abstract

The utility model relates to a long-wave infrared panoramic periscope device, which comprises a panoramic annular imaging lens and an infrared detector component which are coaxially arranged and fixedly connected, wherein the panoramic annular imaging lens images incident light and then projects the incident light onto the infrared detector component; the panoramic annular imaging lens comprises a panoramic annular lens and a subsequent image transferring component which are sequentially arranged along an optical axis from an object space to an image space, wherein the panoramic annular lens is a convex polyhedron rotationally symmetrical around the optical axis, the oblique side surface, close to the object space, on the panoramic annular lens is a first refraction surface, the oblique side surface, close to the image space, is a first reflection surface, a sunken annular concave surface is arranged at the center of the first refraction surface, the annular concave surface is a second reflection surface, an annular convex surface with a sunken edge is arranged at the center of the first reflection surface, and the annular convex surface is a second refraction surface; the ratio of the outer diameter size of the first refraction surface to the central thickness size of the panoramic annular lens is 1: 1. The coating has a good stray light inhibition effect, and can prevent pollution between adjacent coating surfaces during coating.

Description

Long-wave infrared panoramic periscope device

Technical Field

The utility model relates to an optical imaging technical field, concretely relates to infrared panorama periscope device of long wave.

Background

In the shipboard, submarine, airborne tracking, searching and navigating optoelectronic systems, the optical system is increasingly required to have a larger observation field. Meanwhile, in special fields such as periscope systems and airborne systems, increasingly high requirements on the space volume and weight of an optical system are provided, the largest design challenge for a periscope is a strict volume requirement, and in order to ensure compatibility with the existing photoelectric mast system, the whole sensor system (including optoelectronics and electronics) needs to be placed in a cylinder body with a small size and effectively detect a target, and the optical system is required to realize large-field (panoramic) staring imaging in a limited small-volume space range.

In order to meet the requirements of a periscopic system on miniaturization and panoramic imaging of an optical system, especially providing a 360-degree panoramic view field of an infrared band in real time is the research focus of the periscopic system at the present stage. The following methods are generally used to realize panoramic imaging: the method of swing scanning by using a small field optical system to obtain a panoramic field requires additional motion space and cannot meet the real-time requirement. The method adopting multi-camera splicing has larger volume and cost and is difficult to ensure the stability. The ultra-wide angle method using the fisheye lens causes large distortion in a large field range. And the imaging mode based on the plane cylindrical projection principle opens up a new technical approach for panoramic imaging.

The united states began military applications using hemispherical imaging technology since the end of the last 90 s and gradually expanded the imaging field of view. The famous colleges and universities in China, such as Qinghua university and Sichuan university, carry out earlier theoretical and experimental verification research based on the planar cylindrical projection principle, but the conventional panoramic imaging system (360-degree field of view) mainly focuses on the design of a visible light wave band. There are several different configurations to achieve the desired field of view range. These structures include rotating cameras, multi-camera stitching, catadioptric systems, fisheye lenses. The first three schemes increase the complexity and volume of the system and cannot acquire a 360-degree field of view in real time. Fisheye lenses have been used in imaging systems with multiple large fields of view, but their spatial resolution is variable, with the resolution approaching the horizontal field of view being minimal. Furthermore, such lenses can become large when the field of view needs to cover the entire hemisphere. Based on volume and speed limitations, we consider using a panoramic annular lens to implement a long-wave infrared panoramic periscope application. Because the field range of the panoramic annular lens is large, stray light is easy to introduce, and 4 aspheric surfaces with different surface types are required to be finished on one lens of the panoramic annular lens and are respectively coated with films, the main difficulties of the long-wave infrared panoramic periscope include: stray light suppression, prevention of adjacent film pollution during coating processing of panoramic annular lenses, non-uniform correction and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a long wave infrared panorama periscope device, which has better stray light inhibiting effect, the second reflecting surface and the second refraction surface adopt a sinking structure, and the adjacent surfaces can be shielded when one surface is coated, so as to prevent the problem of imaging edge blurring caused by mutual pollution when the adjacent surfaces are coated; the arrangement of the correction baffle plate and the tension spring reduces the correction motor backlash, realizes non-uniform correction, and realizes the imaging effect of small size, high resolution and low stray light.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a long-wave infrared panoramic periscope device comprises a panoramic annular imaging lens and an infrared detector assembly which are coaxially arranged and fixedly connected, wherein the panoramic annular imaging lens images incident light and projects the imaged incident light onto the infrared detector assembly; the panoramic annular imaging lens comprises a panoramic annular lens and a subsequent image transferring component which are sequentially arranged along an optical axis from an object side to an image side, wherein the panoramic annular lens is a convex polyhedron rotationally symmetrical around the optical axis, the inclined side surface, close to the object side, of the panoramic annular lens is a first refraction surface, the inclined side surface, close to the image side, of the panoramic annular lens is a first reflection surface, a sunken annular concave surface is arranged at the center of the first refraction surface, the annular concave surface at the center of the first refraction surface is a second reflection surface, an annular convex surface sunken in the edge is arranged at the center of the first reflection surface, the annular convex surface at the center of the first reflection surface is a second refraction surface, and the second refraction surface refracts light entering the panoramic annular imaging lens to the subsequent image transferring component; the ratio of the outer diameter size of the first refraction surface to the central thickness size of the panoramic annular lens is 1: 1.

Further, the panoramic annular imaging lens also comprises a main lens barrel, and the panoramic annular lens and the subsequent image transferring component are coaxially arranged in the main lens barrel; an annular step surface is arranged at the edge of a first refraction surface of the panoramic annular lens, a front pressing ring is arranged at one end, close to the panoramic annular lens, of the main lens barrel, and the front pressing ring is clamped with the annular step surface and fixedly connected with the main lens barrel; and a rear pressing ring is fixedly arranged at one end of the main lens cone, which is far away from the panoramic annular lens, and the rear pressing ring presses the subsequent image transferring component tightly.

Furthermore, a cylindrical step is arranged on the side surface of the panoramic annular lens close to the first reflecting surface, the cylindrical surface of the cylindrical step is in transition fit with the inner wall of the main lens cone, the step surface of the cylindrical step is tightly abutted against the end part of the main lens cone through a front spacer ring, and the outer wall of the main lens cone is fixedly connected with the inner wall of the front pressing ring.

Further, the subsequent image transfer component comprises a front image transfer lens, a middle image transfer lens and a rear image transfer lens which are rotationally symmetrical around an optical axis, the front image transfer lens, the middle image transfer lens and the rear image transfer lens are sequentially and coaxially arranged, and the front image transfer lens is arranged close to the panoramic annular lens; and a middle spacing ring is fixedly arranged between the front image rotating lens and the middle image rotating lens, and a rear spacing ring is fixedly arranged between the middle image rotating lens and the rear image rotating lens.

Furthermore, antireflection films are plated on the surfaces of the first refraction surface and the second refraction surface of the panoramic annular lens, and reflection films are plated on the surfaces of the first reflection surface and the second reflection surface of the panoramic annular lens.

Furthermore, the infrared detector assembly comprises a detector shell, the detector shell is of a cylindrical structure with one open end, a switching disc is fixedly arranged at the open end, and an opening is formed in the center of the switching disc; the detector comprises a detector shell, a switching disc, a detector base, a detector connecting plate, a preposed analog circuit board, an analog control circuit board, a digital circuit board and an interface circuit board, wherein the detector base, the detector connecting plate, the preposed analog circuit board, the analog control circuit board, the digital circuit board and the interface circuit board are sequentially arranged in the detector shell, the detector base is fixedly connected with the switching disc, the detector connecting plate, the preposed analog circuit board, the analog control circuit board, the digital circuit board and the interface circuit board are fixedly installed through a circuit board support column and; an infrared detector is arranged on the detector connecting plate, and the target surface of the infrared detector is over against the opening in the center of the adapter disc; and a socket is arranged at one end of the detector shell, which is far away from the switching disc, the socket penetrates through the detector shell, and a cable penetrates through the socket to be electrically connected with the interface circuit board.

Further, the infrared detector assembly further comprises a correction motor, the correction motor is installed on the detector base through a correction motor base, a correction baffle is fixedly arranged on a motor shaft of the correction motor, and when the motor runs, the correction baffle rotates along the motor shaft of the correction motor to shield or release the target surface of the infrared detector.

Furthermore, a limiting column is arranged on the correction motor base, and when the correction baffle rotates to a certain position, the limiting column interferes with the correction baffle and is used for limiting the stroke of the correction baffle.

Furthermore, a tension spring is also arranged on the correction baffle, one end of the tension spring is fixedly connected with the correction baffle, and the other end of the tension spring is fixedly connected with the detector seat; when the correction baffle covers the target surface of the infrared detector, the tension spring extends; when the correction baffle releases the target surface of the infrared detector, the tension spring resets.

Furthermore, the outer wall of the panoramic annular imaging lens is provided with a switching lens cone, and the inner wall of the switching lens cone is in threaded connection with the outer wall of the panoramic annular imaging lens; a device shell is arranged outside the infrared detector assembly, the end part of the device shell is fixedly connected with the end part of the adapter lens cone, and a focusing space ring is arranged between the device shell and the adapter lens cone and has flexibility.

The utility model has the advantages that: the utility model provides a long wave infrared panorama periscope device, which lengthens the center thickness of the panorama zone lens and has better stray light inhibition effect; the second reflecting surface and the second refraction surface adopt a sinking structure, so that adjacent surfaces can be shielded firstly when one surface is coated with a film, and the problem of imaging edge blurring caused by mutual pollution when the adjacent surfaces are coated with the film is prevented; the arrangement of the correction baffle plate and the tension spring reduces the correction motor backlash, realizes non-uniform correction, and realizes the imaging effect of small size, high resolution and low stray light.

Drawings

FIG. 1 is a sectional view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the panoramic annular imaging lens of the present invention;

FIG. 3 is a cross-sectional view of the panoramic annular lens of the present invention;

FIG. 4 is a schematic view of the optical path of the panoramic annular imaging lens of the present invention;

fig. 5 is a sectional view of the infrared detector assembly of the present invention;

fig. 6 is a top view of the infrared detector assembly of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises a panoramic annular imaging lens, 2, countersunk screws, 3, a device shell, 4, an infrared detector assembly, 5, a focusing spacer ring, 6, a flat pad, 7, an elastic pad, 8, inner hexagonal screws, 9, a switching lens cone, 10 and set screws; 1.1, panoramic annular lens, 1.2, a front pressing ring, 1.3, a front spacing ring, 1.4, a main lens cone, 1.5, a middle spacing ring, 1.6, a rear spacing ring, 1.7, a rear pressing ring, 1.8, a rear image rotating lens, 1.9, a middle image rotating lens, 1.10, a front image rotating lens, 1.11 and a set screw; 4.1, a correction motor base, 4.2, screws, 4.3, screws, 4.4, a detector connecting plate, 4.5, an analog control circuit board, 4.6, a digital circuit board, 4.7, an interface circuit board, 4.8, a detector shell, 4.9, an interface board, 4.10, screws, 4.11, insulating columns, 4.12, a socket, 4.13, a circuit board screw, 4.14, an insulating column, 4.15, a circuit board support column, 4.16, a correction motor, 4.17, a front analog circuit board, 4.18, an insulating pad, 4.19, a detector base, 4.20, a tension spring, 4.21, a set screw, 4.22, a countersunk head screw, 4.23, a coupler, 4.24, a countersunk head screw, 4.25, a limiting column, 4.26, a screw, 4.27, a correction baffle, 4.28, a countersunk head screw, 4.29, an infrared detector, 4.30 and an adapter disc; 1.1a, a second reflecting surface, 1.1b, a first refraction surface, 1.1c, a second refraction surface, 1.1d and a first reflecting surface; the center thickness of the panoramic annular lens, phi and the outer diameter of the first refraction surface.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The long-wave infrared panoramic periscope device shown in the figure 1 comprises a panoramic annular imaging lens 1 and an infrared detector assembly 4 which are coaxially arranged and fixedly connected, wherein the panoramic annular imaging lens 1 is connected with the infrared detector assembly 4 through a sunk screw 2. As shown in the optical path diagram of fig. 4, the panoramic annular imaging lens 1 images the incident light and projects the imaged incident light onto the infrared detector assembly 4; the panoramic annular imaging lens 1 comprises a panoramic annular lens 1.1 and a subsequent image transferring component which are arranged along an optical axis from an object side to an image side in sequence, the panoramic annular lens 1.1 is a convex polyhedron which is rotationally symmetrical around an optical axis, the oblique side surface of the panoramic annular lens 1.1 close to an object side is a first refraction surface 1.1b, the oblique side surface of the panoramic annular lens close to an image side is a first reflection surface 1.1d, a sunken annular concave surface is arranged at the center of the first refraction surface 1.1b, the annular concave surface at the center of the first refraction surface 1.1b is a second reflection surface 1.1a, an annular convex surface with a sunken edge is arranged at the center of the first reflecting surface 1.1d, the annular convex surface at the center of the first reflecting surface 1.1d is a second reflecting surface 1.1c, the edge of the second reflecting surface 1.1c sinks 0.5mm at the inner edge of the first reflecting surface 1.1d, the second refraction surface 1.1c refracts the light entering the panoramic annular imaging lens 1 to the subsequent image transfer component; as shown in fig. 3, the ratio of the size of the outer diameter Φ of the first refracting surface to the size of the central thickness of the panoramic annular lens is 1: 1.

Refer to the optical path diagram of fig. 4. Because the panoramic annular lens has a large view field, stray light is easy to introduce. Therefore, after analyzing stray light of incident light with different angles, the stray light of secondary reflection is greatly reduced when the thickness of the panoramic annular lens is properly increased. Through simulation analysis and optimization, the design result of the panoramic annular lens in the embodiment is finally determined, and the ratio of the size of the outer diameter phi of the first refraction surface to the size of the central thickness of the panoramic annular lens is 1: 1. Main path of stray light generation: when the ratio of the size of the outer diameter phi of the first refraction surface to the size of the central thickness of the panoramic annular lens is small (namely, the central thickness of the panoramic annular lens is relatively small), light emitted by an object does not exit from the second refraction surface 1.1c after passing through the first refraction surface 1.1b, the first reflection surface 1.1d and the second reflection surface 1.1a, but exits from the second refraction surface 1.1c after being reflected by the first reflection surface 1.1d and the second reflection surface 1.1a for one time respectively, and the light rays are converged on a target surface of an infrared detector after passing through a subsequent turning lens to form main stray light. The generation of such stray light can be avoided by appropriately increasing the thickness of the panoramic annular lens.

The coating process of the panoramic annular lens 1.1 is as follows: firstly, plating antireflection films on a first reflecting surface 1.1d and a second reflecting surface 1.1c, then covering the second reflecting surface 1.1c, and plating a reflecting film on the first reflecting surface 1.1 d; and secondly, turning the lens over, plating antireflection films on the first refraction surface 1.1b and the second reflection surface 1.1a, shielding the annulus of the first refraction surface 1.1b, and plating a reflection film on the second reflection surface 1.1 a. Because the second reflecting surface 1.1a and the second refraction surface 1.1c all adopt the formula structure of sinking, be convenient for shelter from adjacent coating film face in the coating film flow, prevent to cause the pollution to adjacent coating film face, coating film face border can not reach the coating film effect of ideal, make every coating film more even, reach more ideal formation of image effect.

As shown in fig. 2, the panoramic annular imaging lens 1 further includes a main lens barrel 1.4, and the panoramic annular lens 1.1 and the subsequent relay imaging component are coaxially disposed in the main lens barrel 1.4; an annular step surface is arranged at the edge of a first refraction surface 1.1b of the panoramic annular lens 1.1, a front pressing ring 1.2 is arranged at one end, close to the panoramic annular lens 1.1, of the main lens cone 1.4, and the front pressing ring 1.2 is tightly clamped with the annular step surface and is fixedly connected with the main lens cone 1.4 through a set screw 1.11; and a rear pressing ring 1.7 is fixedly arranged at one end of the main lens barrel 1.4 far away from the panoramic annular lens 1.1, and the rear pressing ring 1.7 tightly presses the subsequent image transfer component.

As shown in fig. 2 to 3, a cylindrical step is arranged on a side surface of the panoramic annular lens 1.1 close to the first reflecting surface 1.1d, a cylindrical surface of the cylindrical step is in transition fit with an inner wall of the main lens barrel 1.4, a step surface of the cylindrical step is abutted against an end of the main lens barrel 1.4 through a front spacer 1.3, and an outer wall of the main lens barrel 1.4 is fixedly connected with an inner wall of the front pressing ring 1.2.

In this embodiment, the subsequent image transfer component includes a front image transfer lens 1.10, a middle image transfer lens 1.9, and a rear image transfer lens 1.8 that are rotationally symmetric around the optical axis, the front image transfer lens 1.10, the middle image transfer lens 1.9, and the rear image transfer lens 1.8 are coaxially arranged in sequence, and the front image transfer lens 1.10 is arranged close to the panoramic annular lens 1.1; a middle spacing ring 1.5 is fixedly arranged between the front image transfer lens 1.10 and the middle image transfer lens 1.9, and a rear spacing ring 1.6 is fixedly arranged between the middle image transfer lens 1.9 and the rear image transfer lens 1.8.

As shown in fig. 3, the first refractive surface 1.1b and the second refractive surface 1.1c of the panoramic annular lens 1.1The surfaces of the first reflecting surface 1.1d and the second reflecting surface 1.1a of the panoramic annular lens 1.1 are plated with reflection films which are represented by the symbol ⊕

And (4) showing.

As shown in fig. 4, the infrared detector assembly 4 includes a detector housing 4.8, the detector housing 4.8 is a cylindrical structure with an open end, an adapter disc 4.30 is fixedly disposed at the open end of the detector housing 4.8, the detector housing 4.8 is fixedly connected with the adapter disc 4.30 through a screw 4.2, and an opening is disposed in the center of the adapter disc 4.30; the detector is characterized in that a detector base 4.19, a detector connecting plate 4.4, a preposed analog circuit board 4.17, an analog control circuit board 4.5, a digital circuit board 4.6 and an interface circuit board 4.7 are sequentially arranged in the detector shell 4.8, the detector base 4.19 is fixedly connected with the adapter disc 4.30, countersunk head screws 4.28 distributed circumferentially are arranged on the adapter disc 4.30, the adapter disc 4.30 is fixedly connected with the detector base 4.19 through the countersunk head screws 4.28, the detector connecting plate 4.4 is fixedly connected with the detector base 4.19 through screws 4.3, and an insulating pad 4.18 is arranged between the connecting surface of the detector connecting plate 4.4 and the detector base 4.19. The detector connecting plate 4.4, the preposed analog circuit board 4.17, the analog control circuit board 4.5, the digital circuit board 4.6 and the interface circuit board 4.7 are fixedly arranged on a circuit board strut 4.15 and are electrically connected in sequence. The bottom of the circuit board support 4.15 is insulatively connected with the edge of the circuit board on the circuit board support through the circuit board screw 4.13 and the insulation column 4.14. The circuit board support 4.15 is fixedly connected with the detector base 4.19; an infrared detector 4.29 is arranged on the detector connecting plate 4.4, the target surface of the infrared detector 4.29 is over against the opening in the center of the adapter disc 4.30, an image generated by the panoramic annular imaging lens 1 is refracted to the target surface of the infrared detector 4.29 by the second refraction surface 1.1c, an optical signal of the image is collected by the infrared detector 4.29 and converted into an electric signal, and the electric signal is transmitted to a circuit board for processing; a socket 4.12 is arranged at one end of the detector shell, which is far away from the adapter disc 4.30, the socket 4.12 penetrates through the detector shell, and a cable penetrates through the socket 4.12 to be electrically connected with the interface circuit board 4.7. An interface board 4.9 is also fixedly arranged outside the detector shell 4.8 at a position corresponding to the socket 4.12, and the interface board 4.9 is fixedly arranged on the detector shell 4.8 through a screw 4.10 and an insulating column 4.11. The interface board 4.9 is provided with a through hole for fixing the cable, preventing the cable from being dragged out of the device by external pulling force, and interrupting the connection of the device and external equipment to lose the functions of power supply and signal connection.

As shown in fig. 1 and 5, the infrared detector assembly 4 further includes a calibration motor 4.16, and the calibration motor 4.16 is mounted on the detector base 4.19 through a calibration motor base 4.1. Specifically, the housing of the correction motor 4.16 is locked on the correction motor base 4.1 by the screw 4.26, and then the set screw 4.21 is applied to the correction motor base 4.1 to further fix the housing of the correction motor 4.16 on the correction motor base 4.1. A correcting baffle 4.27 is fixedly arranged on a motor shaft of the correcting motor 4.16, the correcting baffle 4.27 is fixedly connected with the motor shaft through a coupler 4.23 arranged on the motor shaft, a connecting point deviates from the center of the correcting baffle 4.27, and the correcting baffle 4.27 is fixedly arranged on the coupler 4.23 through a sunk screw 4.22. When the motor is operated, the correcting baffle 4.27 rotates along the motor shaft of the correcting motor 4.16 to shield or release the target surface of the infrared detector 4.29, and is used for correcting the unevenness of the infrared detector 4.29 system by the following method: the target surface of the infrared detector 4.29 is typically once calibrated before use of the periscope system, and then released from the infrared detector 4.29.

Further, as shown in fig. 5, two limiting columns 4.25 are arranged on the correction motor base 4.1, and the two limiting columns 4.25 are respectively and fixedly mounted on the correction motor base 4.1 through two countersunk head screws 4.24. When the correcting baffle 4.27 rotates to a certain position, the limiting column 4.25 interferes with the correcting baffle 4.27 to limit the stroke of the correcting baffle 4.27.

As shown in fig. 5, a tension spring 4.20 is further disposed on the calibration baffle 4.27, one end of the tension spring 4.20 is fixedly connected with the calibration baffle 4.27, and the other end thereof is fixedly connected with the detector seat 4.19; when the target surface of the infrared detector 4.29 is shielded by the correction baffle 4.27, the tension spring 4.20 is extended; when the correction baffle 4.27 releases the target surface of the infrared detector 4.29, the tension spring 4.20 resets, the tension spring 4.20 is matched with the correction baffle 4.27, the reset elastic force of the tension spring 4.20 is utilized to drive the correction baffle 4.27 to reset, and the phenomenon of idle return of the motor is effectively reduced.

As shown in fig. 1, an adapter lens barrel 9 is arranged on the outer wall of the panoramic annular imaging lens 1, the inner wall of the adapter lens barrel 9 is in threaded connection with the outer wall of the panoramic annular imaging lens 1, and then is further fixedly connected through a set screw 10 to enhance the reliability of connection; the infrared detector subassembly 4 is provided with device shell 3 outward, the tip of device shell 3 with the tip of switching lens cone 9 carries out fixed connection through hexagon socket head cap screw 8, sets up between hexagon socket head cap screw 8 and the tie point flat pad 6 and bullet pad 7 and is used for the anticreep, device shell 3 with still be equipped with focusing spacer ring 5 between the switching lens cone 9, focusing spacer ring 5 has the pliability, and the accessible is adjusted the connection elasticity of hexagon socket head cap screw 8 and is in order to adjust the thickness of focusing spacer ring 5 to for the camera lens focusing.

Incident light is imaged after a series of reflection and refraction in the panoramic annular lens 1.1 along the light path shown in FIG. 4, and then is projected onto the infrared detector assembly 4 after being transferred by the subsequent image transferring assembly; the infrared detector 4.29 on the infrared detector component 4 collects the optical signal of the image, converts the optical signal into an analog electrical signal, carries out analog/digital conversion by the circuit board and then processes the analog electrical signal, and finally outputs the image digital signal to external equipment through a cable.

The long-wave infrared panoramic periscope device provided by the embodiment lengthens the central thickness of the panoramic annular lens and has a good effect of inhibiting stray light; the second reflecting surface 1.1a and the second refracting surface 1.1c adopt a sinking structure, so that adjacent surfaces can be shielded firstly when one surface is coated, and the problem of imaging edge blurring caused by mutual pollution when the adjacent surfaces are coated is prevented; the arrangement of the correction baffle plate 4.27 and the tension spring 4.20 reduces the idle return of the correction motor 4.16 to realize non-uniform correction, and realizes the imaging effect of small size, high resolution and low stray light.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The long-wave infrared panoramic periscope device is characterized by comprising a panoramic annular imaging lens (1) and an infrared detector component (4), wherein the panoramic annular imaging lens (1) and the infrared detector component (4) are coaxially arranged and fixedly connected, and incident light is imaged by the panoramic annular imaging lens (1) and then projected onto the infrared detector component (4); the panoramic annular imaging lens (1) comprises a panoramic annular lens (1.1) and a subsequent image transferring component which are arranged along an optical axis in sequence from an object side to an image side, the panoramic annular lens (1.1) is a convex polyhedron which is rotationally symmetrical around an optical axis, the oblique side surface of the panoramic annular lens (1.1) close to an object side is a first refraction surface (1.1b), the oblique side surface of the panoramic annular lens close to an image side is a first reflection surface (1.1d), a sunken annular concave surface is arranged at the center of the first refraction surface (1.1b), the annular concave surface at the center of the first refraction surface (1.1b) is a second reflection surface (1.1a), an annular convex surface with a sunk edge is arranged at the center of the first reflecting surface (1.1d), the annular convex surface at the center of the first reflecting surface (1.1d) is a second refracting surface (1.1c), the second refraction surface (1.1c) refracts the light entering the panoramic annular imaging lens (1) to the subsequent relay image component; the ratio of the size of the outer diameter (phi) of the first refraction surface to the size of the central thickness () of the panoramic annular lens is 1: 1.

2. The long-wave infrared panoramic periscope arrangement according to claim 1, characterized in that, the panoramic annular imaging lens (1) further comprises a main lens barrel (1.4), the panoramic annular lens (1.1) and the subsequent relay component are coaxially arranged in the main lens barrel (1.4); an annular step surface is arranged at the edge of a first refraction surface (1.1b) of the panoramic annular lens (1.1), a front pressing ring (1.2) is arranged at one end, close to the panoramic annular lens (1.1), of the main lens cone (1.4), and the front pressing ring (1.2) is clamped with the annular step surface and fixedly connected with the main lens cone (1.4); and a rear pressing ring (1.7) is fixedly arranged at one end of the main lens cone (1.4) far away from the panoramic annular lens (1.1), and the rear pressing ring (1.7) presses the subsequent image transfer component tightly.

3. The long-wave infrared panoramic periscope device according to claim 2, characterized in that a cylindrical step is arranged on the side surface of the panoramic annular lens (1.1) near the first reflecting surface (1.1d), the cylindrical surface of the cylindrical step is in transition fit with the inner wall of the main lens barrel (1.4), the step surface of the cylindrical step is abutted against the end of the main lens barrel (1.4) through a front-mounted spacer ring (1.3), and the outer wall of the main lens barrel (1.4) is fixedly connected with the inner wall of the front-mounted pressing ring (1.2).

4. The long-wave infrared panoramic periscope arrangement according to claim 1, wherein the subsequent relay assembly comprises a front relay lens (1.10), an intermediate relay lens (1.9) and a rear relay lens (1.8) which are rotationally symmetric around the optical axis, the front relay lens (1.10), the intermediate relay lens (1.9) and the rear relay lens (1.8) are coaxially arranged in sequence, and the front relay lens (1.10) is arranged close to the panoramic annular lens (1.1); an intermediate spacing ring (1.5) is fixedly arranged between the front image transfer lens (1.10) and the intermediate image transfer lens (1.9), and a rear spacing ring (1.6) is fixedly arranged between the intermediate image transfer lens (1.9) and the rear image transfer lens (1.8).

5. The long-wave infrared panoramic periscope arrangement according to claim 1, characterized in that the surfaces of the first refracting surface (1.1b) and the second refracting surface (1.1c) of the panoramic annular lens (1.1) are coated with antireflection film, and the surfaces of the first reflecting surface (1.1d) and the second reflecting surface (1.1a) of the panoramic annular lens (1.1) are coated with reflecting film.

6. The long-wave infrared panoramic periscope arrangement according to claim 1, characterized in that the infrared detector assembly (4) comprises a detector housing (4.8), the detector housing (4.8) is a cylindrical structure with an opening at one end, a switching disc (4.30) is fixedly arranged at the opening end, and an opening is arranged at the center of the switching disc (4.30); a detector seat (4.19), a detector connecting plate (4.4), a preposed analog circuit board (4.17), an analog control circuit board (4.5), a digital circuit board (4.6) and an interface circuit board (4.7) are sequentially arranged in the detector shell (4.8), the detector seat (4.19) is fixedly connected with the adapter disc (4.30), the detector connecting plate (4.4), the preposed analog circuit board (4.17), the analog control circuit board (4.5), the digital circuit board (4.6) and the interface circuit board (4.7) are fixedly installed through a circuit board support (4.15) and are electrically connected in sequence, and the circuit board support (4.15) is fixedly connected with the detector seat (4.19); an infrared detector (4.29) is arranged on the detector connecting plate (4.4), and the target surface of the infrared detector (4.29) is over against the opening in the center of the adapter disc (4.30); a socket (4.12) is arranged at one end, far away from the adapter disc (4.30), of the detector shell, the socket (4.12) penetrates through the detector shell, and a cable penetrates through the socket (4.12) and is electrically connected with the interface circuit board (4.7).

7. A long-wave infrared panoramic periscope arrangement according to claim 6, characterized in that the infrared detector assembly (4) further comprises a calibration motor (4.16), the calibration motor (4.16) is mounted on the detector base (4.19) through a calibration motor base (4.1), a calibration baffle (4.27) is fixedly arranged on a motor shaft of the calibration motor (4.16), and when the motor is operated, the calibration baffle (4.27) rotates along the motor shaft of the calibration motor (4.16) to shield or release the target surface of the infrared detector (4.29).

8. A long-wave infrared panoramic periscope arrangement according to claim 7, characterized in that the calibration motor mount (4.1) is provided with a limit post (4.25), and when the calibration baffle (4.27) is rotated to a certain position, the limit post (4.25) interferes with the calibration baffle (4.27) for limiting the stroke of the calibration baffle (4.27).

9. The long-wave infrared panoramic periscope device according to claim 7, characterized in that a tension spring (4.20) is further provided on the calibration baffle (4.27), one end of the tension spring (4.20) is fixedly connected with the calibration baffle (4.27), and the other end thereof is fixedly connected with the detector base (4.19); when the target surface of the infrared detector (4.29) is shielded by the correction baffle (4.27), the tension spring (4.20) is extended; when the correction baffle (4.27) releases the target surface of the infrared detector (4.29), the tension spring (4.20) is reset.

10. The long-wave infrared panoramic periscope device according to claim 1, characterized in that the outer wall of the panoramic annular imaging lens (1) is provided with a adapter lens barrel (9), the inner wall of the adapter lens barrel (9) is in threaded connection with the outer wall of the panoramic annular imaging lens (1); the infrared detector assembly (4) is externally provided with a device shell (3), the end part of the device shell (3) is fixedly connected with the end part of the switching lens cone (9), a focusing space ring (5) is further arranged between the device shell (3) and the switching lens cone (9), and the focusing space ring (5) has flexibility.